Diego can type 140 in 4 minutes

1. at this rate, how long will it take him to type 385 words?

2. how many words can he type in 15 minutes?

11 min and 525 words

Step-by-step explanation:

I put 140 words/ 4 mins and simplified it to 35 words /1 min

Doing so i plug in what was given and used cross multiply and divid :D

1. He will take 11 minutes to type 385

2. He can type 525 words in 15 minutes

Step-by-step explanation:

1. Since he can type 140 words in 4 minutes, he can type 35 words in one minute. So 385 words, if typed at 35 words per minute, would be typed in 11 minutes since 385/35=11.

2. 15 minutes times 35 words per minute is equal to 525 words.

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

step-by-step explanation: